<?php
/**
 * Smarty plugin to format text blocks
 *
 * @package Smarty
 * @subpackage PluginsBlock
 */

/**
 * Smarty {textformat}{/textformat} block plugin
 *
 * Type: block function<br>
 * Name: textformat<br>
 * Purpose: format text a certain way with preset styles
 * or custom wrap/indent settings<br>
 * Params:
 * <pre>
 * - style - string (email)
 * - indent - integer (0)
 * - wrap - integer (80)
 * - wrap_char - string ("\n")
 * - indent_char - string (" ")
 * - wrap_boundary - boolean (true)
 * </pre>
 *
 * @link http://www.smarty.net/manual/en/language.function.textformat.php
 *       {textformat}
 *       (Smarty online manual)
 * @param $params array
 *       	 parameters
 * @param $content string
 *       	 contents of the block
 * @param $template Smarty_Internal_Template
 *       	 template object
 * @param
 *       	 boolean &$repeat repeat flag
 * @return string content re-formatted
 * @author Monte Ohrt <monte at ohrt dot com>
 */
function smarty_block_textformat($params, $content, $template, &$repeat) {
	if (is_null ( $content )) {
		return;
	}
	
	$style = null;
	$indent = 0;
	$indent_first = 0;
	$indent_char = ' ';
	$wrap = 80;
	$wrap_char = "\n";
	$wrap_cut = false;
	$assign = null;
	
	foreach ( $params as $_key => $_val ) {
		switch ($_key) {
			case 'style' :
			case 'indent_char' :
			case 'wrap_char' :
			case 'assign' :
				$$_key = ( string ) $_val;
				break;
			
			case 'indent' :
			case 'indent_first' :
			case 'wrap' :
				$$_key = ( int ) $_val;
				break;
			
			case 'wrap_cut' :
				$$_key = ( bool ) $_val;
				break;
			
			default :
				trigger_error ( "textformat: unknown attribute '$_key'" );
		}
	}
	
	if ($style == 'email') {
		$wrap = 72;
	}
	// split into paragraphs
	$_paragraphs = preg_split ( '![\r\n]{2}!', $content );
	$_output = '';
	
	foreach ( $_paragraphs as &$_paragraph ) {
		if (! $_paragraph) {
			continue;
		}
		// convert mult. spaces & special chars to single space
		$_paragraph = preg_replace ( array ('!\s+!' . Smarty::$_UTF8_MODIFIER, '!(^\s+)|(\s+$)!' . Smarty::$_UTF8_MODIFIER ), array (' ', '' ), $_paragraph );
		// indent first line
		if ($indent_first > 0) {
			$_paragraph = str_repeat ( $indent_char, $indent_first ) . $_paragraph;
		}
		// wordwrap sentences
		if (Smarty::$_MBSTRING) {
			require_once (SMARTY_PLUGINS_DIR . 'shared.mb_wordwrap.php');
			$_paragraph = smarty_mb_wordwrap ( $_paragraph, $wrap - $indent, $wrap_char, $wrap_cut );
		} else {
			$_paragraph = wordwrap ( $_paragraph, $wrap - $indent, $wrap_char, $wrap_cut );
		}
		// indent lines
		if ($indent > 0) {
			$_paragraph = preg_replace ( '!^!m', str_repeat ( $indent_char, $indent ), $_paragraph );
		}
	}
	$_output = implode ( $wrap_char . $wrap_char, $_paragraphs );
	
	if ($assign) {
		$template->assign ( $assign, $_output );
	} else {
		return $_output;
	}
}

?>